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<div class="title">index_io.cpp</div>  </div>
</div><!--header-->
<div class="contents">
<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment">/**</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> * Copyright (c) 2015-present, Facebook, Inc.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> * This source code is licensed under the CC-by-NC license found in the</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment"> * LICENSE file in the root directory of this source tree.</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;</div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment">// Copyright 2004-present Facebook. All Rights Reserved.</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;</div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="preprocessor">#include &quot;index_io.h&quot;</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;</div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="preprocessor">#include &lt;cstdio&gt;</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="preprocessor">#include &lt;cstdlib&gt;</span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;</div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="preprocessor">#include &lt;sys/mman.h&gt;</span></div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;</div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="preprocessor">#include &quot;FaissAssert.h&quot;</span></div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;</div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="preprocessor">#include &quot;IndexFlat.h&quot;</span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="preprocessor">#include &quot;VectorTransform.h&quot;</span></div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="preprocessor">#include &quot;IndexLSH.h&quot;</span></div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="preprocessor">#include &quot;IndexPQ.h&quot;</span></div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;<span class="preprocessor">#include &quot;IndexIVF.h&quot;</span></div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="preprocessor">#include &quot;IndexIVFPQ.h&quot;</span></div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;</div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="comment">/*************************************************************</span></div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="comment"> * The I/O format is the content of the class. For objects that are</span></div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="comment"> * inherited, like Index, a 4-character-code indicates which child</span></div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="comment"> * class this is an instance of.</span></div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="comment"> * In this case, the fields of the parent class are written first,</span></div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="comment"> * then the ones for the child classes. Note that this requires</span></div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="comment"> * classes to be serialized to have a constructor without parameters,</span></div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="comment"> * so that the fields can be filled in later.</span></div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="comment"> **************************************************************/</span></div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;</div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;<span class="keyword">namespace </span>faiss {</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;<span class="keyword">static</span> uint32_t fourcc (<span class="keyword">const</span> <span class="keywordtype">char</span> sx[4]) {</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *x = (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>*)sx;</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;    <span class="keywordflow">return</span> x[0] | x[1] &lt;&lt; 8 | x[2] &lt;&lt; 16 | x[3] &lt;&lt; 24;</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;}</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;<span class="comment">/*************************************************************</span></div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;<span class="comment"> * I/O macros</span></div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;<span class="comment"> * we use macros so that we have a line number to report in</span></div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;<span class="comment"> * abort (). This makes debugging a lot easier.</span></div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;<span class="comment"> **************************************************************/</span></div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;<span class="preprocessor">#define WRITEANDCHECK(ptr, n) {                                 \</span></div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;<span class="preprocessor">        size_t ret = fwrite (ptr, sizeof (* (ptr)), n, f);      \</span></div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;<span class="preprocessor">        FAISS_ASSERT (ret == (n) || !&quot;write error&quot;);                  \</span></div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;<span class="preprocessor">    }</span></div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;<span class="preprocessor">#define READANDCHECK(ptr, n) {                                  \</span></div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;<span class="preprocessor">        size_t ret = fread (ptr, sizeof (* (ptr)), n, f);       \</span></div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;<span class="preprocessor">        FAISS_ASSERT (ret == (n) || !&quot;write error&quot;);                  \</span></div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;<span class="preprocessor">    }</span></div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;<span class="preprocessor">#define WRITE1(x) WRITEANDCHECK(&amp;(x), 1)</span></div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define READ1(x)  READANDCHECK(&amp;(x), 1)</span></div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;<span class="preprocessor">#define WRITEVECTOR(vec) {                      \</span></div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;<span class="preprocessor">        size_t size = (vec).size ();            \</span></div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;<span class="preprocessor">        WRITEANDCHECK (&amp;size, 1);               \</span></div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;<span class="preprocessor">        WRITEANDCHECK ((vec).data (), size);    \</span></div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;<span class="preprocessor">    }</span></div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;<span class="preprocessor">#define READVECTOR(vec) {                       \</span></div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;<span class="preprocessor">        long size;                            \</span></div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;<span class="preprocessor">        READANDCHECK (&amp;size, 1);                \</span></div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;<span class="preprocessor">        FAISS_ASSERT (size &gt;= 0 &amp;&amp; size &lt; (1L &lt;&lt; 40));  \</span></div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;<span class="preprocessor">        (vec).resize (size);                    \</span></div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;<span class="preprocessor">        READANDCHECK ((vec).data (), size);     \</span></div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;<span class="preprocessor">    }</span></div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;<span class="comment">// Macros for read/write arrays aligned to 16 bytes in the</span></div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;<span class="comment">// file. Useful when mmapped.</span></div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;</div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;<span class="preprocessor">#define WRITETABPAD16(tab, size_in) {                                   \</span></div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;<span class="preprocessor">    size_t size = (size_in);                                            \</span></div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;<span class="preprocessor">    WRITEANDCHECK (&amp;size, 1);                                           \</span></div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;<span class="preprocessor">    uint8_t padding[16] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; \</span></div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;<span class="preprocessor">    int idx = ftell(f) % 16;                                            \</span></div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;<span class="preprocessor">    padding [idx] = 15 - idx;                                           \</span></div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;<span class="preprocessor">    WRITEANDCHECK (padding + idx, 16 - idx);                            \</span></div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;<span class="preprocessor">    WRITEANDCHECK ((tab), size);                                        \</span></div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;<span class="preprocessor">}</span></div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;<span class="preprocessor">#define READTABPAD16(tab, basetype, expected_size) {     \</span></div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;<span class="preprocessor">    size_t size;                                \</span></div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;<span class="preprocessor">    READANDCHECK (&amp;size, 1);                    \</span></div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;<span class="preprocessor">    FAISS_ASSERT ((expected_size) == size);           \</span></div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;<span class="preprocessor">    uint8_t padding[16], npad;                  \</span></div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;<span class="preprocessor">    READ1(npad);                                \</span></div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;<span class="preprocessor">    FAISS_ASSERT (npad &lt; 16);                         \</span></div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;<span class="preprocessor">    READANDCHECK (padding, npad);               \</span></div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;<span class="preprocessor">    (tab) = new basetype [size];       \</span></div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;<span class="preprocessor">    READANDCHECK ((tab), size);                 \</span></div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;<span class="preprocessor">}</span></div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;<span class="comment">// read only the array header, return its offset and skip over it</span></div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;<span class="preprocessor">#define TABOFFSETPAD16(taboffset, basetype, expected_size) {    \</span></div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;<span class="preprocessor">    size_t size;                                                \</span></div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;<span class="preprocessor">    READANDCHECK (&amp;size, 1);                                    \</span></div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;<span class="preprocessor">    FAISS_ASSERT ((expected_size) == size);                           \</span></div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;<span class="preprocessor">    uint8_t padding[16], npad;                                  \</span></div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;<span class="preprocessor">    READ1(npad);                                                \</span></div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;<span class="preprocessor">    FAISS_ASSERT (npad &lt; 16);                                         \</span></div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;<span class="preprocessor">    READANDCHECK (padding, npad);                               \</span></div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;<span class="preprocessor">    taboffset = ftell(f);                                       \</span></div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;<span class="preprocessor">    fseek (f, sizeof(basetype) * size, SEEK_CUR);               \</span></div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;<span class="preprocessor">}</span></div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;</div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;</div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;</div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;<span class="comment">/*************************************************************</span></div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;<span class="comment"> * Write</span></div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;<span class="comment"> **************************************************************/</span></div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;</div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;<span class="keyword">static</span> <span class="keywordtype">void</span> write_index_header (<span class="keyword">const</span> Index *idx, FILE *f) {</div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;    WRITE1 (idx-&gt;d);</div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;    WRITE1 (idx-&gt;ntotal);</div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">Index::idx_t</a> dummy = 1 &lt;&lt; 20;</div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;    WRITE1 (dummy);</div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;    WRITE1 (dummy);</div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;    WRITE1 (idx-&gt;is_trained);</div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;    WRITE1 (idx-&gt;metric_type);</div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;}</div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;</div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;</div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;</div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;<span class="keywordtype">void</span> write_VectorTransform (<span class="keyword">const</span> VectorTransform *vt, FILE *f) {</div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;    <span class="keywordflow">if</span> (<span class="keyword">const</span> LinearTransform * lt =</div>
<div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;           dynamic_cast &lt; const LinearTransform *&gt; (vt)) {</div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;        <span class="keywordflow">if</span> (dynamic_cast&lt;const RandomRotationMatrix *&gt;(lt)) {</div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;            uint32_t h = fourcc (<span class="stringliteral">&quot;rrot&quot;</span>);</div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;            WRITE1 (h);</div>
<div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;        } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">const</span> PCAMatrix * pca =</div>
<div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;                   dynamic_cast&lt;const PCAMatrix *&gt;(lt)) {</div>
<div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;            uint32_t h = fourcc (<span class="stringliteral">&quot;PcAm&quot;</span>);</div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;            WRITE1 (h);</div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;            WRITE1 (pca-&gt;eigen_power);</div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;            WRITE1 (pca-&gt;random_rotation);</div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;            WRITE1 (pca-&gt;balanced_bins);</div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;            WRITEVECTOR (pca-&gt;mean);</div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;            WRITEVECTOR (pca-&gt;eigenvalues);</div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;            WRITEVECTOR (pca-&gt;PCAMat);</div>
<div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;        } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;            <span class="comment">// generic LinearTransform (includes OPQ)</span></div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;            uint32_t h = fourcc (<span class="stringliteral">&quot;LTra&quot;</span>);</div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;            WRITE1 (h);</div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;        }</div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;        WRITE1 (lt-&gt;have_bias);</div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;        WRITEVECTOR (lt-&gt;A);</div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;        WRITEVECTOR (lt-&gt;b);</div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">const</span> RemapDimensionsTransform *rdt =</div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;               dynamic_cast&lt;const RemapDimensionsTransform *&gt;(vt)) {</div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;        uint32_t h = fourcc (<span class="stringliteral">&quot;RmDT&quot;</span>);</div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;        WRITEVECTOR (rdt-&gt;map);</div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;    } <span class="keywordflow">else</span> FAISS_ASSERT (!<span class="stringliteral">&quot;cannot serialize this&quot;</span>);</div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;    <span class="comment">// common fields</span></div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;    WRITE1 (vt-&gt;d_in);</div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;    WRITE1 (vt-&gt;d_out);</div>
<div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;    WRITE1 (vt-&gt;is_trained);</div>
<div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;}</div>
<div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;</div>
<div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;<span class="keyword">static</span> <span class="keywordtype">void</span> write_ProductQuantizer (<span class="keyword">const</span> ProductQuantizer *pq, FILE *f) {</div>
<div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;    WRITE1 (pq-&gt;d);</div>
<div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;    WRITE1 (pq-&gt;M);</div>
<div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;    WRITE1 (pq-&gt;nbits);</div>
<div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;    WRITEVECTOR (pq-&gt;centroids);</div>
<div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;}</div>
<div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;</div>
<div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;<span class="keywordtype">void</span> write_ProductQuantizer (<span class="keyword">const</span> ProductQuantizer*pq, <span class="keyword">const</span> <span class="keywordtype">char</span> *fname) {</div>
<div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;    FILE *f = fopen (fname, <span class="stringliteral">&quot;w&quot;</span>);</div>
<div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;    <span class="keywordflow">if</span> (!f) {</div>
<div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;        fprintf (stderr, <span class="stringliteral">&quot;cannot open %s for writing:&quot;</span>, fname);</div>
<div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;        perror (<span class="stringliteral">&quot;&quot;</span>);</div>
<div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;        abort ();</div>
<div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;    }</div>
<div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;    write_ProductQuantizer (pq, f);</div>
<div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;    fclose (f);</div>
<div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;}</div>
<div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;</div>
<div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;</div>
<div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;</div>
<div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;<span class="keyword">static</span> <span class="keywordtype">void</span> write_ivf_header (<span class="keyword">const</span> IndexIVF * ivf, FILE *f,</div>
<div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;                              <span class="keywordtype">bool</span> include_ids = <span class="keyword">true</span>) {</div>
<div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;    write_index_header (ivf, f);</div>
<div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;    WRITE1 (ivf-&gt;nlist);</div>
<div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;    WRITE1 (ivf-&gt;nprobe);</div>
<div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;    write_index (ivf-&gt;quantizer, f);</div>
<div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160;    <span class="keywordflow">if</span> (include_ids) {</div>
<div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; ivf-&gt;nlist; i++)</div>
<div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;            WRITEVECTOR (ivf-&gt;ids[i]);</div>
<div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;    }</div>
<div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;    WRITE1 (ivf-&gt;maintain_direct_map);</div>
<div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;    WRITEVECTOR (ivf-&gt;direct_map);</div>
<div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;}</div>
<div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;</div>
<div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;<span class="keywordtype">void</span> write_index (<span class="keyword">const</span> Index *idx, FILE *f) {</div>
<div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;    <span class="keywordflow">if</span> (<span class="keyword">const</span> IndexFlat * idxf = dynamic_cast&lt;const IndexFlat *&gt; (idx)) {</div>
<div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;        uint32_t h = fourcc (</div>
<div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;              idxf-&gt;metric_type == METRIC_INNER_PRODUCT ? <span class="stringliteral">&quot;IxFI&quot;</span> :</div>
<div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;              idxf-&gt;metric_type == METRIC_L2 ? <span class="stringliteral">&quot;IxF2&quot;</span> : <span class="keyword">nullptr</span>);</div>
<div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;        write_index_header (idx, f);</div>
<div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;        WRITEVECTOR (idxf-&gt;xb);</div>
<div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexLSH * idxl = dynamic_cast&lt;const IndexLSH *&gt; (idx)) {</div>
<div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;        uint32_t h = fourcc (<span class="stringliteral">&quot;IxHe&quot;</span>);</div>
<div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;        write_index_header (idx, f);</div>
<div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;        WRITE1 (idxl-&gt;nbits);</div>
<div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160;        WRITE1 (idxl-&gt;rotate_data);</div>
<div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;        WRITE1 (idxl-&gt;train_thresholds);</div>
<div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;        WRITEVECTOR (idxl-&gt;thresholds);</div>
<div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;        WRITE1 (idxl-&gt;bytes_per_vec);</div>
<div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;        write_VectorTransform (&amp;idxl-&gt;rrot, f);</div>
<div class="line"><a name="l00229"></a><span class="lineno">  229</span>&#160;        WRITEVECTOR (idxl-&gt;codes);</div>
<div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexPQ * idxp = dynamic_cast&lt;const IndexPQ *&gt; (idx)) {</div>
<div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;        uint32_t h = fourcc (<span class="stringliteral">&quot;IxPq&quot;</span>);</div>
<div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;        write_index_header (idx, f);</div>
<div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;        write_ProductQuantizer (&amp;idxp-&gt;pq, f);</div>
<div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;        WRITEVECTOR (idxp-&gt;codes);</div>
<div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;        <span class="comment">// search params -- maybe not useful to store?</span></div>
<div class="line"><a name="l00237"></a><span class="lineno">  237</span>&#160;        WRITE1 (idxp-&gt;search_type);</div>
<div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;        WRITE1 (idxp-&gt;encode_signs);</div>
<div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;        WRITE1 (idxp-&gt;polysemous_ht);</div>
<div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexIVFFlat * ivfl =</div>
<div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;              dynamic_cast&lt;const IndexIVFFlat *&gt; (idx)) {</div>
<div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;        uint32_t h = fourcc (<span class="stringliteral">&quot;IvFl&quot;</span>);</div>
<div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160;        write_ivf_header (ivfl, f);</div>
<div class="line"><a name="l00245"></a><span class="lineno">  245</span>&#160;        <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i = 0; i &lt; ivfl-&gt;nlist; i++)</div>
<div class="line"><a name="l00246"></a><span class="lineno">  246</span>&#160;            WRITEVECTOR (ivfl-&gt;vecs[i]);</div>
<div class="line"><a name="l00247"></a><span class="lineno">  247</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexIVFPQ * ivpq =</div>
<div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;              dynamic_cast&lt;const IndexIVFPQ *&gt; (idx)) {</div>
<div class="line"><a name="l00249"></a><span class="lineno">  249</span>&#160;        <span class="keyword">const</span> IndexIVFPQR * ivfpqr = <span class="keyword">dynamic_cast&lt;</span><span class="keyword">const </span>IndexIVFPQR *<span class="keyword">&gt;</span> (idx);</div>
<div class="line"><a name="l00250"></a><span class="lineno">  250</span>&#160;        <span class="keyword">const</span> IndexIVFPQCompact * ivfpqc =</div>
<div class="line"><a name="l00251"></a><span class="lineno">  251</span>&#160;            <span class="keyword">dynamic_cast&lt;</span><span class="keyword">const </span>IndexIVFPQCompact *<span class="keyword">&gt;</span> (idx);</div>
<div class="line"><a name="l00252"></a><span class="lineno">  252</span>&#160;        uint32_t h = fourcc (ivfpqr ? <span class="stringliteral">&quot;IvQR&quot;</span> : ivfpqc ? <span class="stringliteral">&quot;IvPC&quot;</span> : <span class="stringliteral">&quot;IvPQ&quot;</span>);</div>
<div class="line"><a name="l00253"></a><span class="lineno">  253</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00254"></a><span class="lineno">  254</span>&#160;        write_ivf_header (ivpq, f, !ivfpqc);</div>
<div class="line"><a name="l00255"></a><span class="lineno">  255</span>&#160;        WRITE1 (ivpq-&gt;by_residual);</div>
<div class="line"><a name="l00256"></a><span class="lineno">  256</span>&#160;        WRITE1 (ivpq-&gt;code_size);</div>
<div class="line"><a name="l00257"></a><span class="lineno">  257</span>&#160;        write_ProductQuantizer (&amp;ivpq-&gt;pq, f);</div>
<div class="line"><a name="l00258"></a><span class="lineno">  258</span>&#160;        <span class="keywordflow">if</span> (!ivfpqc) {</div>
<div class="line"><a name="l00259"></a><span class="lineno">  259</span>&#160;            <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i = 0; i &lt; ivpq-&gt;codes.size(); i++)</div>
<div class="line"><a name="l00260"></a><span class="lineno">  260</span>&#160;                WRITEVECTOR (ivpq-&gt;codes[i]);</div>
<div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;        }</div>
<div class="line"><a name="l00262"></a><span class="lineno">  262</span>&#160;        <span class="keywordflow">if</span> (ivfpqr) {</div>
<div class="line"><a name="l00263"></a><span class="lineno">  263</span>&#160;            write_ProductQuantizer (&amp;ivfpqr-&gt;refine_pq, f);</div>
<div class="line"><a name="l00264"></a><span class="lineno">  264</span>&#160;            WRITEVECTOR (ivfpqr-&gt;refine_codes);</div>
<div class="line"><a name="l00265"></a><span class="lineno">  265</span>&#160;            WRITE1 (ivfpqr-&gt;k_factor);</div>
<div class="line"><a name="l00266"></a><span class="lineno">  266</span>&#160;        }</div>
<div class="line"><a name="l00267"></a><span class="lineno">  267</span>&#160;        <span class="keywordflow">if</span> (ivfpqc) {</div>
<div class="line"><a name="l00268"></a><span class="lineno">  268</span>&#160;            WRITETABPAD16 (ivfpqc-&gt;limits, ivfpqc-&gt;nlist + 1);</div>
<div class="line"><a name="l00269"></a><span class="lineno">  269</span>&#160;            WRITETABPAD16 (ivfpqc-&gt;compact_ids, ivfpqc-&gt;ntotal);</div>
<div class="line"><a name="l00270"></a><span class="lineno">  270</span>&#160;            WRITETABPAD16 (ivfpqc-&gt;compact_codes,</div>
<div class="line"><a name="l00271"></a><span class="lineno">  271</span>&#160;                           ivfpqc-&gt;ntotal * ivfpqc-&gt;code_size);</div>
<div class="line"><a name="l00272"></a><span class="lineno">  272</span>&#160;        }</div>
<div class="line"><a name="l00273"></a><span class="lineno">  273</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexPreTransform * ixpt =</div>
<div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160;              dynamic_cast&lt;const IndexPreTransform *&gt; (idx)) {</div>
<div class="line"><a name="l00275"></a><span class="lineno">  275</span>&#160;        uint32_t h = fourcc (<span class="stringliteral">&quot;IxPT&quot;</span>);</div>
<div class="line"><a name="l00276"></a><span class="lineno">  276</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160;        write_index_header (ixpt, f);</div>
<div class="line"><a name="l00278"></a><span class="lineno">  278</span>&#160;        <span class="keywordtype">int</span> nt = ixpt-&gt;chain.size();</div>
<div class="line"><a name="l00279"></a><span class="lineno">  279</span>&#160;        WRITE1 (nt);</div>
<div class="line"><a name="l00280"></a><span class="lineno">  280</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; nt; i++)</div>
<div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160;            write_VectorTransform (ixpt-&gt;chain[i], f);</div>
<div class="line"><a name="l00282"></a><span class="lineno">  282</span>&#160;        write_index (ixpt-&gt;index, f);</div>
<div class="line"><a name="l00283"></a><span class="lineno">  283</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> MultiIndexQuantizer * imiq =</div>
<div class="line"><a name="l00284"></a><span class="lineno">  284</span>&#160;              dynamic_cast&lt;const MultiIndexQuantizer *&gt; (idx)) {</div>
<div class="line"><a name="l00285"></a><span class="lineno">  285</span>&#160;        uint32_t h = fourcc (<span class="stringliteral">&quot;Imiq&quot;</span>);</div>
<div class="line"><a name="l00286"></a><span class="lineno">  286</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00287"></a><span class="lineno">  287</span>&#160;        write_index_header (imiq, f);</div>
<div class="line"><a name="l00288"></a><span class="lineno">  288</span>&#160;        write_ProductQuantizer (&amp;imiq-&gt;pq, f);</div>
<div class="line"><a name="l00289"></a><span class="lineno">  289</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexRefineFlat * idxrf =</div>
<div class="line"><a name="l00290"></a><span class="lineno">  290</span>&#160;              dynamic_cast&lt;const IndexRefineFlat *&gt; (idx)) {</div>
<div class="line"><a name="l00291"></a><span class="lineno">  291</span>&#160;        uint32_t h = fourcc (<span class="stringliteral">&quot;IxRF&quot;</span>);</div>
<div class="line"><a name="l00292"></a><span class="lineno">  292</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00293"></a><span class="lineno">  293</span>&#160;        write_index_header (idxrf, f);</div>
<div class="line"><a name="l00294"></a><span class="lineno">  294</span>&#160;        write_index (idxrf-&gt;base_index, f);</div>
<div class="line"><a name="l00295"></a><span class="lineno">  295</span>&#160;        write_index (&amp;idxrf-&gt;refine_index, f);</div>
<div class="line"><a name="l00296"></a><span class="lineno">  296</span>&#160;        WRITE1 (idxrf-&gt;k_factor);</div>
<div class="line"><a name="l00297"></a><span class="lineno">  297</span>&#160;    } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00298"></a><span class="lineno">  298</span>&#160;        FAISS_ASSERT (!<span class="stringliteral">&quot;don&#39;t know how to serialize this type of index&quot;</span>);</div>
<div class="line"><a name="l00299"></a><span class="lineno">  299</span>&#160;    }</div>
<div class="line"><a name="l00300"></a><span class="lineno">  300</span>&#160;}</div>
<div class="line"><a name="l00301"></a><span class="lineno">  301</span>&#160;</div>
<div class="line"><a name="l00302"></a><span class="lineno">  302</span>&#160;<span class="keywordtype">void</span> write_index (<span class="keyword">const</span> Index *idx, <span class="keyword">const</span> <span class="keywordtype">char</span> *fname) {</div>
<div class="line"><a name="l00303"></a><span class="lineno">  303</span>&#160;    FILE *f = fopen (fname, <span class="stringliteral">&quot;w&quot;</span>);</div>
<div class="line"><a name="l00304"></a><span class="lineno">  304</span>&#160;    <span class="keywordflow">if</span> (!f) {</div>
<div class="line"><a name="l00305"></a><span class="lineno">  305</span>&#160;        fprintf (stderr, <span class="stringliteral">&quot;cannot open %s for writing:&quot;</span>, fname);</div>
<div class="line"><a name="l00306"></a><span class="lineno">  306</span>&#160;        perror (<span class="stringliteral">&quot;&quot;</span>);</div>
<div class="line"><a name="l00307"></a><span class="lineno">  307</span>&#160;        abort ();</div>
<div class="line"><a name="l00308"></a><span class="lineno">  308</span>&#160;    }</div>
<div class="line"><a name="l00309"></a><span class="lineno">  309</span>&#160;    write_index (idx, f);</div>
<div class="line"><a name="l00310"></a><span class="lineno">  310</span>&#160;    fclose (f);</div>
<div class="line"><a name="l00311"></a><span class="lineno">  311</span>&#160;}</div>
<div class="line"><a name="l00312"></a><span class="lineno">  312</span>&#160;</div>
<div class="line"><a name="l00313"></a><span class="lineno">  313</span>&#160;<span class="keywordtype">void</span> write_VectorTransform (<span class="keyword">const</span> VectorTransform *vt, <span class="keyword">const</span> <span class="keywordtype">char</span> *fname) {</div>
<div class="line"><a name="l00314"></a><span class="lineno">  314</span>&#160;    FILE *f = fopen (fname, <span class="stringliteral">&quot;w&quot;</span>);</div>
<div class="line"><a name="l00315"></a><span class="lineno">  315</span>&#160;    <span class="keywordflow">if</span> (!f) {</div>
<div class="line"><a name="l00316"></a><span class="lineno">  316</span>&#160;        fprintf (stderr, <span class="stringliteral">&quot;cannot open %s for writing:&quot;</span>, fname);</div>
<div class="line"><a name="l00317"></a><span class="lineno">  317</span>&#160;        perror (<span class="stringliteral">&quot;&quot;</span>);</div>
<div class="line"><a name="l00318"></a><span class="lineno">  318</span>&#160;        abort ();</div>
<div class="line"><a name="l00319"></a><span class="lineno">  319</span>&#160;    }</div>
<div class="line"><a name="l00320"></a><span class="lineno">  320</span>&#160;    write_VectorTransform (vt, f);</div>
<div class="line"><a name="l00321"></a><span class="lineno">  321</span>&#160;    fclose (f);</div>
<div class="line"><a name="l00322"></a><span class="lineno">  322</span>&#160;}</div>
<div class="line"><a name="l00323"></a><span class="lineno">  323</span>&#160;</div>
<div class="line"><a name="l00324"></a><span class="lineno">  324</span>&#160;<span class="comment">/*************************************************************</span></div>
<div class="line"><a name="l00325"></a><span class="lineno">  325</span>&#160;<span class="comment"> * Read</span></div>
<div class="line"><a name="l00326"></a><span class="lineno">  326</span>&#160;<span class="comment"> **************************************************************/</span></div>
<div class="line"><a name="l00327"></a><span class="lineno">  327</span>&#160;</div>
<div class="line"><a name="l00328"></a><span class="lineno">  328</span>&#160;<span class="keyword">static</span> <span class="keywordtype">void</span> read_index_header (Index *idx, FILE *f) {</div>
<div class="line"><a name="l00329"></a><span class="lineno">  329</span>&#160;    READ1 (idx-&gt;d);</div>
<div class="line"><a name="l00330"></a><span class="lineno">  330</span>&#160;    READ1 (idx-&gt;ntotal);</div>
<div class="line"><a name="l00331"></a><span class="lineno">  331</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">Index::idx_t</a> dummy;</div>
<div class="line"><a name="l00332"></a><span class="lineno">  332</span>&#160;    READ1 (dummy);</div>
<div class="line"><a name="l00333"></a><span class="lineno">  333</span>&#160;    READ1 (dummy);</div>
<div class="line"><a name="l00334"></a><span class="lineno">  334</span>&#160;    READ1 (idx-&gt;is_trained);</div>
<div class="line"><a name="l00335"></a><span class="lineno">  335</span>&#160;    READ1 (idx-&gt;metric_type);</div>
<div class="line"><a name="l00336"></a><span class="lineno">  336</span>&#160;    idx-&gt;verbose = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00337"></a><span class="lineno">  337</span>&#160;}</div>
<div class="line"><a name="l00338"></a><span class="lineno">  338</span>&#160;</div>
<div class="line"><a name="l00339"></a><span class="lineno">  339</span>&#160;VectorTransform* read_VectorTransform (FILE *f) {</div>
<div class="line"><a name="l00340"></a><span class="lineno">  340</span>&#160;    uint32_t h;</div>
<div class="line"><a name="l00341"></a><span class="lineno">  341</span>&#160;    READ1 (h);</div>
<div class="line"><a name="l00342"></a><span class="lineno">  342</span>&#160;    VectorTransform *vt = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00343"></a><span class="lineno">  343</span>&#160;</div>
<div class="line"><a name="l00344"></a><span class="lineno">  344</span>&#160;    <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;rrot&quot;</span>) || h == fourcc (<span class="stringliteral">&quot;PCAm&quot;</span>) ||</div>
<div class="line"><a name="l00345"></a><span class="lineno">  345</span>&#160;        h == fourcc (<span class="stringliteral">&quot;LTra&quot;</span>) || h == fourcc (<span class="stringliteral">&quot;PcAm&quot;</span>)) {</div>
<div class="line"><a name="l00346"></a><span class="lineno">  346</span>&#160;        LinearTransform *lt = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00347"></a><span class="lineno">  347</span>&#160;        <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;rrot&quot;</span>)) {</div>
<div class="line"><a name="l00348"></a><span class="lineno">  348</span>&#160;            lt = <span class="keyword">new</span> RandomRotationMatrix ();</div>
<div class="line"><a name="l00349"></a><span class="lineno">  349</span>&#160;        } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;PCAm&quot;</span>) ||</div>
<div class="line"><a name="l00350"></a><span class="lineno">  350</span>&#160;                   h == fourcc (<span class="stringliteral">&quot;PcAm&quot;</span>)) {</div>
<div class="line"><a name="l00351"></a><span class="lineno">  351</span>&#160;            PCAMatrix * pca = <span class="keyword">new</span> PCAMatrix ();</div>
<div class="line"><a name="l00352"></a><span class="lineno">  352</span>&#160;            READ1 (pca-&gt;eigen_power);</div>
<div class="line"><a name="l00353"></a><span class="lineno">  353</span>&#160;            READ1 (pca-&gt;random_rotation);</div>
<div class="line"><a name="l00354"></a><span class="lineno">  354</span>&#160;            <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;PcAm&quot;</span>))</div>
<div class="line"><a name="l00355"></a><span class="lineno">  355</span>&#160;                READ1 (pca-&gt;balanced_bins);</div>
<div class="line"><a name="l00356"></a><span class="lineno">  356</span>&#160;            READVECTOR (pca-&gt;mean);</div>
<div class="line"><a name="l00357"></a><span class="lineno">  357</span>&#160;            READVECTOR (pca-&gt;eigenvalues);</div>
<div class="line"><a name="l00358"></a><span class="lineno">  358</span>&#160;            READVECTOR (pca-&gt;PCAMat);</div>
<div class="line"><a name="l00359"></a><span class="lineno">  359</span>&#160;            lt = pca;</div>
<div class="line"><a name="l00360"></a><span class="lineno">  360</span>&#160;        } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;LTra&quot;</span>)) {</div>
<div class="line"><a name="l00361"></a><span class="lineno">  361</span>&#160;            lt = <span class="keyword">new</span> LinearTransform ();</div>
<div class="line"><a name="l00362"></a><span class="lineno">  362</span>&#160;        }</div>
<div class="line"><a name="l00363"></a><span class="lineno">  363</span>&#160;        READ1 (lt-&gt;have_bias);</div>
<div class="line"><a name="l00364"></a><span class="lineno">  364</span>&#160;        READVECTOR (lt-&gt;A);</div>
<div class="line"><a name="l00365"></a><span class="lineno">  365</span>&#160;        READVECTOR (lt-&gt;b);</div>
<div class="line"><a name="l00366"></a><span class="lineno">  366</span>&#160;        vt = lt;</div>
<div class="line"><a name="l00367"></a><span class="lineno">  367</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;RmDT&quot;</span>)) {</div>
<div class="line"><a name="l00368"></a><span class="lineno">  368</span>&#160;        RemapDimensionsTransform *rdt = <span class="keyword">new</span> RemapDimensionsTransform ();</div>
<div class="line"><a name="l00369"></a><span class="lineno">  369</span>&#160;        READVECTOR (rdt-&gt;map);</div>
<div class="line"><a name="l00370"></a><span class="lineno">  370</span>&#160;        vt = rdt;</div>
<div class="line"><a name="l00371"></a><span class="lineno">  371</span>&#160;    } <span class="keywordflow">else</span> FAISS_ASSERT(!<span class="stringliteral">&quot;fourcc not recognized&quot;</span>);</div>
<div class="line"><a name="l00372"></a><span class="lineno">  372</span>&#160;    READ1 (vt-&gt;d_in);</div>
<div class="line"><a name="l00373"></a><span class="lineno">  373</span>&#160;    READ1 (vt-&gt;d_out);</div>
<div class="line"><a name="l00374"></a><span class="lineno">  374</span>&#160;    READ1 (vt-&gt;is_trained);</div>
<div class="line"><a name="l00375"></a><span class="lineno">  375</span>&#160;    <span class="keywordflow">return</span> vt;</div>
<div class="line"><a name="l00376"></a><span class="lineno">  376</span>&#160;}</div>
<div class="line"><a name="l00377"></a><span class="lineno">  377</span>&#160;</div>
<div class="line"><a name="l00378"></a><span class="lineno">  378</span>&#160;<span class="keyword">static</span> <span class="keywordtype">void</span> read_ProductQuantizer (ProductQuantizer *pq, FILE *f) {</div>
<div class="line"><a name="l00379"></a><span class="lineno">  379</span>&#160;    READ1 (pq-&gt;d);</div>
<div class="line"><a name="l00380"></a><span class="lineno">  380</span>&#160;    READ1 (pq-&gt;M);</div>
<div class="line"><a name="l00381"></a><span class="lineno">  381</span>&#160;    READ1 (pq-&gt;nbits);</div>
<div class="line"><a name="l00382"></a><span class="lineno">  382</span>&#160;    pq-&gt;set_derived_values ();</div>
<div class="line"><a name="l00383"></a><span class="lineno">  383</span>&#160;    READVECTOR (pq-&gt;centroids);</div>
<div class="line"><a name="l00384"></a><span class="lineno">  384</span>&#160;}</div>
<div class="line"><a name="l00385"></a><span class="lineno">  385</span>&#160;</div>
<div class="line"><a name="l00386"></a><span class="lineno">  386</span>&#160;ProductQuantizer * read_ProductQuantizer (<span class="keyword">const</span> <span class="keywordtype">char</span>*fname) {</div>
<div class="line"><a name="l00387"></a><span class="lineno">  387</span>&#160;    FILE *f = fopen (fname, <span class="stringliteral">&quot;r&quot;</span>);</div>
<div class="line"><a name="l00388"></a><span class="lineno">  388</span>&#160;    <span class="keywordflow">if</span> (!f) {</div>
<div class="line"><a name="l00389"></a><span class="lineno">  389</span>&#160;        fprintf (stderr, <span class="stringliteral">&quot;cannot open %s for reading:&quot;</span>, fname);</div>
<div class="line"><a name="l00390"></a><span class="lineno">  390</span>&#160;        perror (<span class="stringliteral">&quot;&quot;</span>);</div>
<div class="line"><a name="l00391"></a><span class="lineno">  391</span>&#160;        abort ();</div>
<div class="line"><a name="l00392"></a><span class="lineno">  392</span>&#160;    }</div>
<div class="line"><a name="l00393"></a><span class="lineno">  393</span>&#160;    ProductQuantizer *pq = <span class="keyword">new</span> ProductQuantizer();</div>
<div class="line"><a name="l00394"></a><span class="lineno">  394</span>&#160;    read_ProductQuantizer(pq, f);</div>
<div class="line"><a name="l00395"></a><span class="lineno">  395</span>&#160;    fclose(f);</div>
<div class="line"><a name="l00396"></a><span class="lineno">  396</span>&#160;    <span class="keywordflow">return</span> pq;</div>
<div class="line"><a name="l00397"></a><span class="lineno">  397</span>&#160;}</div>
<div class="line"><a name="l00398"></a><span class="lineno">  398</span>&#160;</div>
<div class="line"><a name="l00399"></a><span class="lineno">  399</span>&#160;<span class="keyword">static</span> <span class="keywordtype">void</span> read_ivf_header (IndexIVF * ivf, FILE *f,</div>
<div class="line"><a name="l00400"></a><span class="lineno">  400</span>&#160;                             <span class="keywordtype">bool</span> include_ids = <span class="keyword">true</span>) {</div>
<div class="line"><a name="l00401"></a><span class="lineno">  401</span>&#160;    read_index_header (ivf, f);</div>
<div class="line"><a name="l00402"></a><span class="lineno">  402</span>&#160;    READ1 (ivf-&gt;nlist);</div>
<div class="line"><a name="l00403"></a><span class="lineno">  403</span>&#160;    READ1 (ivf-&gt;nprobe);</div>
<div class="line"><a name="l00404"></a><span class="lineno">  404</span>&#160;    ivf-&gt;quantizer = <a class="code" href="namespacefaiss.html#aa46fe38a858ecfde7e0fc0744939d5ad">read_index</a> (f);</div>
<div class="line"><a name="l00405"></a><span class="lineno">  405</span>&#160;    ivf-&gt;own_fields = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00406"></a><span class="lineno">  406</span>&#160;    <span class="keywordflow">if</span> (include_ids) {</div>
<div class="line"><a name="l00407"></a><span class="lineno">  407</span>&#160;        ivf-&gt;ids.resize (ivf-&gt;nlist);</div>
<div class="line"><a name="l00408"></a><span class="lineno">  408</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; ivf-&gt;nlist; i++)</div>
<div class="line"><a name="l00409"></a><span class="lineno">  409</span>&#160;            READVECTOR (ivf-&gt;ids[i]);</div>
<div class="line"><a name="l00410"></a><span class="lineno">  410</span>&#160;    }</div>
<div class="line"><a name="l00411"></a><span class="lineno">  411</span>&#160;    READ1 (ivf-&gt;maintain_direct_map);</div>
<div class="line"><a name="l00412"></a><span class="lineno">  412</span>&#160;    READVECTOR (ivf-&gt;direct_map);</div>
<div class="line"><a name="l00413"></a><span class="lineno">  413</span>&#160;}</div>
<div class="line"><a name="l00414"></a><span class="lineno">  414</span>&#160;</div>
<div class="line"><a name="l00415"></a><span class="lineno">  415</span>&#160;<span class="keyword">static</span> IndexIVFPQ *read_ivfpq (FILE *f, uint32_t h, <span class="keywordtype">bool</span> try_mmap)</div>
<div class="line"><a name="l00416"></a><span class="lineno">  416</span>&#160;{</div>
<div class="line"><a name="l00417"></a><span class="lineno">  417</span>&#160;</div>
<div class="line"><a name="l00418"></a><span class="lineno">  418</span>&#160;    IndexIVFPQR *ivfpqr =</div>
<div class="line"><a name="l00419"></a><span class="lineno">  419</span>&#160;        h == fourcc (<span class="stringliteral">&quot;IvQR&quot;</span>) ? <span class="keyword">new</span> IndexIVFPQR () : nullptr;</div>
<div class="line"><a name="l00420"></a><span class="lineno">  420</span>&#160;    IndexIVFPQCompact *ivfpqc =</div>
<div class="line"><a name="l00421"></a><span class="lineno">  421</span>&#160;        h == fourcc (<span class="stringliteral">&quot;IvPC&quot;</span>) ? <span class="keyword">new</span> IndexIVFPQCompact () : nullptr;</div>
<div class="line"><a name="l00422"></a><span class="lineno">  422</span>&#160;    IndexIVFPQ * ivpq = ivfpqr ? ivfpqr : ivfpqc ? ivfpqc : <span class="keyword">new</span> IndexIVFPQ ();</div>
<div class="line"><a name="l00423"></a><span class="lineno">  423</span>&#160;    read_ivf_header (ivpq, f, !ivfpqc);</div>
<div class="line"><a name="l00424"></a><span class="lineno">  424</span>&#160;    READ1 (ivpq-&gt;by_residual);</div>
<div class="line"><a name="l00425"></a><span class="lineno">  425</span>&#160;    READ1 (ivpq-&gt;code_size);</div>
<div class="line"><a name="l00426"></a><span class="lineno">  426</span>&#160;    read_ProductQuantizer (&amp;ivpq-&gt;pq, f);</div>
<div class="line"><a name="l00427"></a><span class="lineno">  427</span>&#160;    <span class="keywordflow">if</span> (!ivfpqc) {</div>
<div class="line"><a name="l00428"></a><span class="lineno">  428</span>&#160;        ivpq-&gt;codes.resize (ivpq-&gt;nlist);</div>
<div class="line"><a name="l00429"></a><span class="lineno">  429</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; ivpq-&gt;nlist; i++)</div>
<div class="line"><a name="l00430"></a><span class="lineno">  430</span>&#160;            READVECTOR (ivpq-&gt;codes[i]);</div>
<div class="line"><a name="l00431"></a><span class="lineno">  431</span>&#160;    }</div>
<div class="line"><a name="l00432"></a><span class="lineno">  432</span>&#160;    <span class="comment">// precomputed table not stored. It is cheaper to recompute it</span></div>
<div class="line"><a name="l00433"></a><span class="lineno">  433</span>&#160;    ivpq-&gt;use_precomputed_table = 0;</div>
<div class="line"><a name="l00434"></a><span class="lineno">  434</span>&#160;    <span class="keywordflow">if</span> (ivpq-&gt;by_residual)</div>
<div class="line"><a name="l00435"></a><span class="lineno">  435</span>&#160;        ivpq-&gt;precompute_table ();</div>
<div class="line"><a name="l00436"></a><span class="lineno">  436</span>&#160;    <span class="keywordflow">if</span> (ivfpqr) {</div>
<div class="line"><a name="l00437"></a><span class="lineno">  437</span>&#160;        read_ProductQuantizer (&amp;ivfpqr-&gt;refine_pq, f);</div>
<div class="line"><a name="l00438"></a><span class="lineno">  438</span>&#160;        READVECTOR (ivfpqr-&gt;refine_codes);</div>
<div class="line"><a name="l00439"></a><span class="lineno">  439</span>&#160;        READ1 (ivfpqr-&gt;k_factor);</div>
<div class="line"><a name="l00440"></a><span class="lineno">  440</span>&#160;    }</div>
<div class="line"><a name="l00441"></a><span class="lineno">  441</span>&#160;    <span class="keywordflow">if</span> (ivfpqc) {</div>
<div class="line"><a name="l00442"></a><span class="lineno">  442</span>&#160;        <span class="keywordflow">if</span> (!try_mmap) {</div>
<div class="line"><a name="l00443"></a><span class="lineno">  443</span>&#160;            READTABPAD16 (ivfpqc-&gt;limits, uint32_t, ivfpqc-&gt;nlist + 1);</div>
<div class="line"><a name="l00444"></a><span class="lineno">  444</span>&#160;            READTABPAD16 (ivfpqc-&gt;compact_ids, uint32_t, ivfpqc-&gt;ntotal);</div>
<div class="line"><a name="l00445"></a><span class="lineno">  445</span>&#160;            READTABPAD16 (ivfpqc-&gt;compact_codes, uint8_t,</div>
<div class="line"><a name="l00446"></a><span class="lineno">  446</span>&#160;                          ivfpqc-&gt;ntotal * ivfpqc-&gt;code_size);</div>
<div class="line"><a name="l00447"></a><span class="lineno">  447</span>&#160;        } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00448"></a><span class="lineno">  448</span>&#160;            <span class="keywordtype">long</span> offset_limits, offset_compact_ids, offset_compact_codes;</div>
<div class="line"><a name="l00449"></a><span class="lineno">  449</span>&#160;            TABOFFSETPAD16 (offset_limits, uint32_t, ivfpqc-&gt;nlist + 1);</div>
<div class="line"><a name="l00450"></a><span class="lineno">  450</span>&#160;            TABOFFSETPAD16 (offset_compact_ids, uint32_t, ivfpqc-&gt;ntotal);</div>
<div class="line"><a name="l00451"></a><span class="lineno">  451</span>&#160;            TABOFFSETPAD16 (offset_compact_codes, uint8_t,</div>
<div class="line"><a name="l00452"></a><span class="lineno">  452</span>&#160;                            ivfpqc-&gt;ntotal * ivfpqc-&gt;code_size);</div>
<div class="line"><a name="l00453"></a><span class="lineno">  453</span>&#160;            ivfpqc-&gt;mmap_length = ftell (f);</div>
<div class="line"><a name="l00454"></a><span class="lineno">  454</span>&#160;            <span class="comment">// mmap the whole file</span></div>
<div class="line"><a name="l00455"></a><span class="lineno">  455</span>&#160;            ivfpqc-&gt;mmap_buffer = (<span class="keywordtype">char</span>*)mmap (</div>
<div class="line"><a name="l00456"></a><span class="lineno">  456</span>&#160;                    <span class="keyword">nullptr</span>, ivfpqc-&gt;mmap_length,</div>
<div class="line"><a name="l00457"></a><span class="lineno">  457</span>&#160;                    PROT_READ, MAP_SHARED, fileno (f), 0);</div>
<div class="line"><a name="l00458"></a><span class="lineno">  458</span>&#160;            <span class="keywordflow">if</span> (!ivfpqc-&gt;mmap_buffer) {</div>
<div class="line"><a name="l00459"></a><span class="lineno">  459</span>&#160;                perror (<span class="stringliteral">&quot;mmap failed&quot;</span>);</div>
<div class="line"><a name="l00460"></a><span class="lineno">  460</span>&#160;                abort ();</div>
<div class="line"><a name="l00461"></a><span class="lineno">  461</span>&#160;            }</div>
<div class="line"><a name="l00462"></a><span class="lineno">  462</span>&#160;            <span class="comment">// at this point the file can be closed, it does not</span></div>
<div class="line"><a name="l00463"></a><span class="lineno">  463</span>&#160;            <span class="comment">// invalidate the mapping</span></div>
<div class="line"><a name="l00464"></a><span class="lineno">  464</span>&#160;            ivfpqc-&gt;limits = (uint32_t*)(ivfpqc-&gt;mmap_buffer + offset_limits);</div>
<div class="line"><a name="l00465"></a><span class="lineno">  465</span>&#160;            ivfpqc-&gt;compact_ids = (uint32_t*)(ivfpqc-&gt;mmap_buffer +</div>
<div class="line"><a name="l00466"></a><span class="lineno">  466</span>&#160;                                              offset_compact_ids);</div>
<div class="line"><a name="l00467"></a><span class="lineno">  467</span>&#160;            ivfpqc-&gt;compact_codes = (uint8_t*)(ivfpqc-&gt;mmap_buffer +</div>
<div class="line"><a name="l00468"></a><span class="lineno">  468</span>&#160;                                               offset_compact_codes);</div>
<div class="line"><a name="l00469"></a><span class="lineno">  469</span>&#160;        }</div>
<div class="line"><a name="l00470"></a><span class="lineno">  470</span>&#160;    }</div>
<div class="line"><a name="l00471"></a><span class="lineno">  471</span>&#160;    <span class="keywordflow">return</span> ivpq;</div>
<div class="line"><a name="l00472"></a><span class="lineno">  472</span>&#160;}</div>
<div class="line"><a name="l00473"></a><span class="lineno">  473</span>&#160;</div>
<div class="line"><a name="l00474"></a><span class="lineno">  474</span>&#160;<span class="keywordtype">int</span> read_old_fmt_hack = 0;</div>
<div class="line"><a name="l00475"></a><span class="lineno">  475</span>&#160;</div>
<div class="line"><a name="l00476"></a><span class="lineno"><a class="line" href="namespacefaiss.html#aa46fe38a858ecfde7e0fc0744939d5ad">  476</a></span>&#160;<a class="code" href="structfaiss_1_1Index.html">Index</a> *<a class="code" href="namespacefaiss.html#aa46fe38a858ecfde7e0fc0744939d5ad">read_index</a> (FILE * f, <span class="keywordtype">bool</span> try_mmap) {</div>
<div class="line"><a name="l00477"></a><span class="lineno">  477</span>&#160;    <a class="code" href="structfaiss_1_1Index.html">Index</a> * idx = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00478"></a><span class="lineno">  478</span>&#160;    uint32_t h;</div>
<div class="line"><a name="l00479"></a><span class="lineno">  479</span>&#160;    READ1 (h);</div>
<div class="line"><a name="l00480"></a><span class="lineno">  480</span>&#160;    <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;IxFI&quot;</span>) || h == fourcc (<span class="stringliteral">&quot;IxF2&quot;</span>)) {</div>
<div class="line"><a name="l00481"></a><span class="lineno">  481</span>&#160;        <a class="code" href="structfaiss_1_1IndexFlat.html">IndexFlat</a> *idxf;</div>
<div class="line"><a name="l00482"></a><span class="lineno">  482</span>&#160;        <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;IxFI&quot;</span>)) idxf = <span class="keyword">new</span> <a class="code" href="structfaiss_1_1IndexFlatIP.html">IndexFlatIP</a> ();</div>
<div class="line"><a name="l00483"></a><span class="lineno">  483</span>&#160;        <span class="keywordflow">else</span>                      idxf = <span class="keyword">new</span> <a class="code" href="structfaiss_1_1IndexFlatL2.html">IndexFlatL2</a> ();</div>
<div class="line"><a name="l00484"></a><span class="lineno">  484</span>&#160;        read_index_header (idxf, f);</div>
<div class="line"><a name="l00485"></a><span class="lineno">  485</span>&#160;        READVECTOR (idxf-&gt;<a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>);</div>
<div class="line"><a name="l00486"></a><span class="lineno">  486</span>&#160;        FAISS_ASSERT (idxf-&gt;<a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>.size() == idxf-&gt;<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> * idxf-&gt;<a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>);</div>
<div class="line"><a name="l00487"></a><span class="lineno">  487</span>&#160;        idx = idxf;</div>
<div class="line"><a name="l00488"></a><span class="lineno">  488</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc(<span class="stringliteral">&quot;IxHE&quot;</span>) || h == fourcc(<span class="stringliteral">&quot;IxHe&quot;</span>)) {</div>
<div class="line"><a name="l00489"></a><span class="lineno">  489</span>&#160;        <a class="code" href="structfaiss_1_1IndexLSH.html">IndexLSH</a> * idxl = <span class="keyword">new</span> <a class="code" href="structfaiss_1_1IndexLSH.html">IndexLSH</a> ();</div>
<div class="line"><a name="l00490"></a><span class="lineno">  490</span>&#160;        read_index_header (idxl, f);</div>
<div class="line"><a name="l00491"></a><span class="lineno">  491</span>&#160;        READ1 (idxl-&gt;<a class="code" href="structfaiss_1_1IndexLSH.html#af8c48006f210f0cbbf45ec9972558d20">nbits</a>);</div>
<div class="line"><a name="l00492"></a><span class="lineno">  492</span>&#160;        READ1 (idxl-&gt;<a class="code" href="structfaiss_1_1IndexLSH.html#a71e9142e1256705f125ded9d647f4497">rotate_data</a>);</div>
<div class="line"><a name="l00493"></a><span class="lineno">  493</span>&#160;        READ1 (idxl-&gt;<a class="code" href="structfaiss_1_1IndexLSH.html#a5d4d6ea1fc709605d5b2061d1bce27d6">train_thresholds</a>);</div>
<div class="line"><a name="l00494"></a><span class="lineno">  494</span>&#160;        READVECTOR (idxl-&gt;<a class="code" href="structfaiss_1_1IndexLSH.html#ae203ad895b15ae16fc1a748661b84df3">thresholds</a>);</div>
<div class="line"><a name="l00495"></a><span class="lineno">  495</span>&#160;        READ1 (idxl-&gt;<a class="code" href="structfaiss_1_1IndexLSH.html#a0116f529bc5de64a7ef142caa652d9f6">bytes_per_vec</a>);</div>
<div class="line"><a name="l00496"></a><span class="lineno">  496</span>&#160;        <span class="keywordflow">if</span> (h == fourcc(<span class="stringliteral">&quot;IxHE&quot;</span>)) {</div>
<div class="line"><a name="l00497"></a><span class="lineno">  497</span>&#160;            FAISS_ASSERT (idxl-&gt;<a class="code" href="structfaiss_1_1IndexLSH.html#af8c48006f210f0cbbf45ec9972558d20">nbits</a> % 64 == 0 ||</div>
<div class="line"><a name="l00498"></a><span class="lineno">  498</span>&#160;                          !<span class="stringliteral">&quot;can only read old format IndexLSH with &quot;</span></div>
<div class="line"><a name="l00499"></a><span class="lineno">  499</span>&#160;                          <span class="stringliteral">&quot;nbits multiple of 64&quot;</span>);</div>
<div class="line"><a name="l00500"></a><span class="lineno">  500</span>&#160;            idxl-&gt;<a class="code" href="structfaiss_1_1IndexLSH.html#a0116f529bc5de64a7ef142caa652d9f6">bytes_per_vec</a> *= 8;</div>
<div class="line"><a name="l00501"></a><span class="lineno">  501</span>&#160;        }</div>
<div class="line"><a name="l00502"></a><span class="lineno">  502</span>&#160;        {</div>
<div class="line"><a name="l00503"></a><span class="lineno">  503</span>&#160;            <a class="code" href="structfaiss_1_1RandomRotationMatrix.html">RandomRotationMatrix</a> *rrot = <span class="keyword">dynamic_cast&lt;</span><a class="code" href="structfaiss_1_1RandomRotationMatrix.html">RandomRotationMatrix</a> *<span class="keyword">&gt;</span></div>
<div class="line"><a name="l00504"></a><span class="lineno">  504</span>&#160;                (read_VectorTransform (f));</div>
<div class="line"><a name="l00505"></a><span class="lineno">  505</span>&#160;            FAISS_ASSERT(rrot || !<span class="stringliteral">&quot;expected a random rotation&quot;</span>);</div>
<div class="line"><a name="l00506"></a><span class="lineno">  506</span>&#160;            idxl-&gt;<a class="code" href="structfaiss_1_1IndexLSH.html#a71c8aa08d3bd0483ccc0f11c22cd3cd8">rrot</a> = *rrot;</div>
<div class="line"><a name="l00507"></a><span class="lineno">  507</span>&#160;            <span class="keyword">delete</span> rrot;</div>
<div class="line"><a name="l00508"></a><span class="lineno">  508</span>&#160;        }</div>
<div class="line"><a name="l00509"></a><span class="lineno">  509</span>&#160;        READVECTOR (idxl-&gt;<a class="code" href="structfaiss_1_1IndexLSH.html#a55c0f1127850af0d06ef22fc8b791572">codes</a>);</div>
<div class="line"><a name="l00510"></a><span class="lineno">  510</span>&#160;        FAISS_ASSERT (idxl-&gt;<a class="code" href="structfaiss_1_1IndexLSH.html#a71c8aa08d3bd0483ccc0f11c22cd3cd8">rrot</a>.d_in == idxl-&gt;<a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a> &amp;&amp;</div>
<div class="line"><a name="l00511"></a><span class="lineno">  511</span>&#160;                      idxl-&gt;<a class="code" href="structfaiss_1_1IndexLSH.html#a71c8aa08d3bd0483ccc0f11c22cd3cd8">rrot</a>.<a class="code" href="structfaiss_1_1VectorTransform.html#a589d612f7b1773614619a0cbecd728a9">d_out</a> == idxl-&gt;<a class="code" href="structfaiss_1_1IndexLSH.html#af8c48006f210f0cbbf45ec9972558d20">nbits</a>);</div>
<div class="line"><a name="l00512"></a><span class="lineno">  512</span>&#160;        FAISS_ASSERT (idxl-&gt;<a class="code" href="structfaiss_1_1IndexLSH.html#a55c0f1127850af0d06ef22fc8b791572">codes</a>.size() == idxl-&gt;<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> * idxl-&gt;<a class="code" href="structfaiss_1_1IndexLSH.html#a0116f529bc5de64a7ef142caa652d9f6">bytes_per_vec</a>);</div>
<div class="line"><a name="l00513"></a><span class="lineno">  513</span>&#160;        idx = idxl;</div>
<div class="line"><a name="l00514"></a><span class="lineno">  514</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;IxPQ&quot;</span>) || h == fourcc (<span class="stringliteral">&quot;IxPo&quot;</span>) ||</div>
<div class="line"><a name="l00515"></a><span class="lineno">  515</span>&#160;               h == fourcc (<span class="stringliteral">&quot;IxPq&quot;</span>)) {</div>
<div class="line"><a name="l00516"></a><span class="lineno">  516</span>&#160;        <span class="comment">// IxPQ and IxPo were merged into the same IndexPQ object</span></div>
<div class="line"><a name="l00517"></a><span class="lineno">  517</span>&#160;        <a class="code" href="structfaiss_1_1IndexPQ.html">IndexPQ</a> * idxp =<span class="keyword">new</span> <a class="code" href="structfaiss_1_1IndexPQ.html">IndexPQ</a> ();</div>
<div class="line"><a name="l00518"></a><span class="lineno">  518</span>&#160;        read_index_header (idxp, f);</div>
<div class="line"><a name="l00519"></a><span class="lineno">  519</span>&#160;        read_ProductQuantizer (&amp;idxp-&gt;<a class="code" href="structfaiss_1_1IndexPQ.html#aa7b7cfe0c8dfd37c8a940fd93d12dc88">pq</a>, f);</div>
<div class="line"><a name="l00520"></a><span class="lineno">  520</span>&#160;        READVECTOR (idxp-&gt;<a class="code" href="structfaiss_1_1IndexPQ.html#a490b64b12384951ed66548a3a48f91e5">codes</a>);</div>
<div class="line"><a name="l00521"></a><span class="lineno">  521</span>&#160;        <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;IxPo&quot;</span>) || h == fourcc (<span class="stringliteral">&quot;IxPq&quot;</span>)) {</div>
<div class="line"><a name="l00522"></a><span class="lineno">  522</span>&#160;            READ1 (idxp-&gt;search_type);</div>
<div class="line"><a name="l00523"></a><span class="lineno">  523</span>&#160;            READ1 (idxp-&gt;encode_signs);</div>
<div class="line"><a name="l00524"></a><span class="lineno">  524</span>&#160;            READ1 (idxp-&gt;<a class="code" href="structfaiss_1_1IndexPQ.html#aff455f2adff6064939494dad6e3017bc">polysemous_ht</a>);</div>
<div class="line"><a name="l00525"></a><span class="lineno">  525</span>&#160;        }</div>
<div class="line"><a name="l00526"></a><span class="lineno">  526</span>&#160;        <span class="comment">// Old versoins of PQ all had metric_type set to INNER_PRODUCT</span></div>
<div class="line"><a name="l00527"></a><span class="lineno">  527</span>&#160;        <span class="comment">// when they were in fact using L2. Therefore, we force metric type</span></div>
<div class="line"><a name="l00528"></a><span class="lineno">  528</span>&#160;        <span class="comment">// to L2 when the old format is detected</span></div>
<div class="line"><a name="l00529"></a><span class="lineno">  529</span>&#160;        <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;IxPQ&quot;</span>) || h == fourcc (<span class="stringliteral">&quot;IxPo&quot;</span>)) {</div>
<div class="line"><a name="l00530"></a><span class="lineno">  530</span>&#160;            idxp-&gt;<a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a> = METRIC_L2;</div>
<div class="line"><a name="l00531"></a><span class="lineno">  531</span>&#160;        }</div>
<div class="line"><a name="l00532"></a><span class="lineno">  532</span>&#160;        idx = idxp;</div>
<div class="line"><a name="l00533"></a><span class="lineno">  533</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(h == fourcc (<span class="stringliteral">&quot;IvFl&quot;</span>)) {</div>
<div class="line"><a name="l00534"></a><span class="lineno">  534</span>&#160;        <a class="code" href="structfaiss_1_1IndexIVFFlat.html">IndexIVFFlat</a> * ivfl = <span class="keyword">new</span> <a class="code" href="structfaiss_1_1IndexIVFFlat.html">IndexIVFFlat</a> ();</div>
<div class="line"><a name="l00535"></a><span class="lineno">  535</span>&#160;        read_ivf_header (ivfl, f);</div>
<div class="line"><a name="l00536"></a><span class="lineno">  536</span>&#160;        ivfl-&gt;<a class="code" href="structfaiss_1_1IndexIVFFlat.html#a52f87a2c6a9282b5b74a8615fef1b4b7">vecs</a>.resize (ivfl-&gt;<a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a>);</div>
<div class="line"><a name="l00537"></a><span class="lineno">  537</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; ivfl-&gt;<a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a>; i++)</div>
<div class="line"><a name="l00538"></a><span class="lineno">  538</span>&#160;            READVECTOR (ivfl-&gt;<a class="code" href="structfaiss_1_1IndexIVFFlat.html#a52f87a2c6a9282b5b74a8615fef1b4b7">vecs</a>[i]);</div>
<div class="line"><a name="l00539"></a><span class="lineno">  539</span>&#160;        idx = ivfl;</div>
<div class="line"><a name="l00540"></a><span class="lineno">  540</span>&#160;</div>
<div class="line"><a name="l00541"></a><span class="lineno">  541</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(h == fourcc (<span class="stringliteral">&quot;IvPQ&quot;</span>) || h == fourcc (<span class="stringliteral">&quot;IvQR&quot;</span>) ||</div>
<div class="line"><a name="l00542"></a><span class="lineno">  542</span>&#160;              h == fourcc (<span class="stringliteral">&quot;IvPC&quot;</span>)) {</div>
<div class="line"><a name="l00543"></a><span class="lineno">  543</span>&#160;</div>
<div class="line"><a name="l00544"></a><span class="lineno">  544</span>&#160;        idx = read_ivfpq (f, h, try_mmap);</div>
<div class="line"><a name="l00545"></a><span class="lineno">  545</span>&#160;</div>
<div class="line"><a name="l00546"></a><span class="lineno">  546</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(h == fourcc (<span class="stringliteral">&quot;IxPT&quot;</span>)) {</div>
<div class="line"><a name="l00547"></a><span class="lineno">  547</span>&#160;        <a class="code" href="structfaiss_1_1IndexPreTransform.html">IndexPreTransform</a> * ixpt = <span class="keyword">new</span> <a class="code" href="structfaiss_1_1IndexPreTransform.html">IndexPreTransform</a>();</div>
<div class="line"><a name="l00548"></a><span class="lineno">  548</span>&#160;        ixpt-&gt;<a class="code" href="structfaiss_1_1IndexPreTransform.html#ae5ec3f184eb211e7d6e204082b52c8c0">own_fields</a> = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00549"></a><span class="lineno">  549</span>&#160;        read_index_header (ixpt, f);</div>
<div class="line"><a name="l00550"></a><span class="lineno">  550</span>&#160;        <span class="keywordtype">int</span> nt;</div>
<div class="line"><a name="l00551"></a><span class="lineno">  551</span>&#160;        <span class="keywordflow">if</span> (read_old_fmt_hack == 2) {</div>
<div class="line"><a name="l00552"></a><span class="lineno">  552</span>&#160;            nt = 1;</div>
<div class="line"><a name="l00553"></a><span class="lineno">  553</span>&#160;        } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00554"></a><span class="lineno">  554</span>&#160;            READ1 (nt);</div>
<div class="line"><a name="l00555"></a><span class="lineno">  555</span>&#160;        }</div>
<div class="line"><a name="l00556"></a><span class="lineno">  556</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; nt; i++)</div>
<div class="line"><a name="l00557"></a><span class="lineno">  557</span>&#160;            ixpt-&gt;chain.push_back (read_VectorTransform (f));</div>
<div class="line"><a name="l00558"></a><span class="lineno">  558</span>&#160;        ixpt-&gt;<a class="code" href="structfaiss_1_1IndexPreTransform.html#aee3cbbe7915ec9ed13d59ca9276bdefc">index</a> = <a class="code" href="namespacefaiss.html#aa46fe38a858ecfde7e0fc0744939d5ad">read_index</a> (f);</div>
<div class="line"><a name="l00559"></a><span class="lineno">  559</span>&#160;        idx = ixpt;</div>
<div class="line"><a name="l00560"></a><span class="lineno">  560</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(h == fourcc (<span class="stringliteral">&quot;Imiq&quot;</span>)) {</div>
<div class="line"><a name="l00561"></a><span class="lineno">  561</span>&#160;        <a class="code" href="structfaiss_1_1MultiIndexQuantizer.html">MultiIndexQuantizer</a> * imiq = <span class="keyword">new</span> <a class="code" href="structfaiss_1_1MultiIndexQuantizer.html">MultiIndexQuantizer</a> ();</div>
<div class="line"><a name="l00562"></a><span class="lineno">  562</span>&#160;        read_index_header (imiq, f);</div>
<div class="line"><a name="l00563"></a><span class="lineno">  563</span>&#160;        read_ProductQuantizer (&amp;imiq-&gt;pq, f);</div>
<div class="line"><a name="l00564"></a><span class="lineno">  564</span>&#160;        idx = imiq;</div>
<div class="line"><a name="l00565"></a><span class="lineno">  565</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(h == fourcc (<span class="stringliteral">&quot;IxRF&quot;</span>)) {</div>
<div class="line"><a name="l00566"></a><span class="lineno">  566</span>&#160;        <a class="code" href="structfaiss_1_1IndexRefineFlat.html">IndexRefineFlat</a> *idxrf = <span class="keyword">new</span> <a class="code" href="structfaiss_1_1IndexRefineFlat.html">IndexRefineFlat</a> ();</div>
<div class="line"><a name="l00567"></a><span class="lineno">  567</span>&#160;        read_index_header (idxrf, f);</div>
<div class="line"><a name="l00568"></a><span class="lineno">  568</span>&#160;        idxrf-&gt;<a class="code" href="structfaiss_1_1IndexRefineFlat.html#a4acc0b3a8c33e5dd8851448ac162dfd0">base_index</a> = <a class="code" href="namespacefaiss.html#aa46fe38a858ecfde7e0fc0744939d5ad">read_index</a>(f);</div>
<div class="line"><a name="l00569"></a><span class="lineno">  569</span>&#160;        idxrf-&gt;<a class="code" href="structfaiss_1_1IndexRefineFlat.html#aaf0f6a094de0e9409effa81bedb9c7e2">own_fields</a> = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00570"></a><span class="lineno">  570</span>&#160;        <a class="code" href="structfaiss_1_1IndexFlat.html">IndexFlat</a> *rf = <span class="keyword">dynamic_cast&lt;</span><a class="code" href="structfaiss_1_1IndexFlat.html">IndexFlat</a>*<span class="keyword">&gt;</span> (<a class="code" href="namespacefaiss.html#aa46fe38a858ecfde7e0fc0744939d5ad">read_index</a> (f));</div>
<div class="line"><a name="l00571"></a><span class="lineno">  571</span>&#160;        std::swap (*rf, idxrf-&gt;<a class="code" href="structfaiss_1_1IndexRefineFlat.html#aab99f32713ece942ccefccf306292ca0">refine_index</a>);</div>
<div class="line"><a name="l00572"></a><span class="lineno">  572</span>&#160;        <span class="keyword">delete</span> rf;</div>
<div class="line"><a name="l00573"></a><span class="lineno">  573</span>&#160;        READ1 (idxrf-&gt;<a class="code" href="structfaiss_1_1IndexRefineFlat.html#a7383fabb28db5b0df45ca4ea81f7acd4">k_factor</a>);</div>
<div class="line"><a name="l00574"></a><span class="lineno">  574</span>&#160;        idx = idxrf;</div>
<div class="line"><a name="l00575"></a><span class="lineno">  575</span>&#160;    } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00576"></a><span class="lineno">  576</span>&#160;        fprintf (stderr, <span class="stringliteral">&quot;Index type 0x%08x not supported\n&quot;</span>, h);</div>
<div class="line"><a name="l00577"></a><span class="lineno">  577</span>&#160;        abort ();</div>
<div class="line"><a name="l00578"></a><span class="lineno">  578</span>&#160;    }</div>
<div class="line"><a name="l00579"></a><span class="lineno">  579</span>&#160;    idx-&gt;set_typename();</div>
<div class="line"><a name="l00580"></a><span class="lineno">  580</span>&#160;    <span class="keywordflow">return</span> idx;</div>
<div class="line"><a name="l00581"></a><span class="lineno">  581</span>&#160;}</div>
<div class="line"><a name="l00582"></a><span class="lineno">  582</span>&#160;</div>
<div class="line"><a name="l00583"></a><span class="lineno">  583</span>&#160;Index *<a class="code" href="namespacefaiss.html#aa46fe38a858ecfde7e0fc0744939d5ad">read_index</a> (<span class="keyword">const</span> <span class="keywordtype">char</span> *fname, <span class="keywordtype">bool</span> try_mmap) {</div>
<div class="line"><a name="l00584"></a><span class="lineno">  584</span>&#160;    FILE *f = fopen (fname, <span class="stringliteral">&quot;r&quot;</span>);</div>
<div class="line"><a name="l00585"></a><span class="lineno">  585</span>&#160;    <span class="keywordflow">if</span> (!f) {</div>
<div class="line"><a name="l00586"></a><span class="lineno">  586</span>&#160;        fprintf (stderr, <span class="stringliteral">&quot;cannot open %s for reading:&quot;</span>, fname);</div>
<div class="line"><a name="l00587"></a><span class="lineno">  587</span>&#160;        perror (<span class="stringliteral">&quot;&quot;</span>);</div>
<div class="line"><a name="l00588"></a><span class="lineno">  588</span>&#160;        abort ();</div>
<div class="line"><a name="l00589"></a><span class="lineno">  589</span>&#160;    }</div>
<div class="line"><a name="l00590"></a><span class="lineno">  590</span>&#160;    Index *idx = <a class="code" href="namespacefaiss.html#aa46fe38a858ecfde7e0fc0744939d5ad">read_index</a> (f, try_mmap);</div>
<div class="line"><a name="l00591"></a><span class="lineno">  591</span>&#160;    fclose (f);</div>
<div class="line"><a name="l00592"></a><span class="lineno">  592</span>&#160;    <span class="keywordflow">return</span> idx;</div>
<div class="line"><a name="l00593"></a><span class="lineno">  593</span>&#160;}</div>
<div class="line"><a name="l00594"></a><span class="lineno">  594</span>&#160;</div>
<div class="line"><a name="l00595"></a><span class="lineno">  595</span>&#160;VectorTransform *read_VectorTransform (<span class="keyword">const</span> <span class="keywordtype">char</span> *fname) {</div>
<div class="line"><a name="l00596"></a><span class="lineno">  596</span>&#160;    FILE *f = fopen (fname, <span class="stringliteral">&quot;r&quot;</span>);</div>
<div class="line"><a name="l00597"></a><span class="lineno">  597</span>&#160;    <span class="keywordflow">if</span> (!f) {</div>
<div class="line"><a name="l00598"></a><span class="lineno">  598</span>&#160;        fprintf (stderr, <span class="stringliteral">&quot;cannot open %s for reading:&quot;</span>, fname);</div>
<div class="line"><a name="l00599"></a><span class="lineno">  599</span>&#160;        perror (<span class="stringliteral">&quot;&quot;</span>);</div>
<div class="line"><a name="l00600"></a><span class="lineno">  600</span>&#160;        abort ();</div>
<div class="line"><a name="l00601"></a><span class="lineno">  601</span>&#160;    }</div>
<div class="line"><a name="l00602"></a><span class="lineno">  602</span>&#160;    VectorTransform *vt = read_VectorTransform (f);</div>
<div class="line"><a name="l00603"></a><span class="lineno">  603</span>&#160;    fclose (f);</div>
<div class="line"><a name="l00604"></a><span class="lineno">  604</span>&#160;    <span class="keywordflow">return</span> vt;</div>
<div class="line"><a name="l00605"></a><span class="lineno">  605</span>&#160;}</div>
<div class="line"><a name="l00606"></a><span class="lineno">  606</span>&#160;</div>
<div class="line"><a name="l00607"></a><span class="lineno">  607</span>&#160;<span class="comment">/*************************************************************</span></div>
<div class="line"><a name="l00608"></a><span class="lineno">  608</span>&#160;<span class="comment"> * cloning functions</span></div>
<div class="line"><a name="l00609"></a><span class="lineno">  609</span>&#160;<span class="comment"> **************************************************************/</span></div>
<div class="line"><a name="l00610"></a><span class="lineno">  610</span>&#160;</div>
<div class="line"><a name="l00611"></a><span class="lineno">  611</span>&#160;</div>
<div class="line"><a name="l00612"></a><span class="lineno">  612</span>&#160;</div>
<div class="line"><a name="l00613"></a><span class="lineno">  613</span>&#160;Index * clone_index (<span class="keyword">const</span> Index *index)</div>
<div class="line"><a name="l00614"></a><span class="lineno">  614</span>&#160;{</div>
<div class="line"><a name="l00615"></a><span class="lineno">  615</span>&#160;    Cloner cl;</div>
<div class="line"><a name="l00616"></a><span class="lineno">  616</span>&#160;    <span class="keywordflow">return</span> cl.clone_Index (index);</div>
<div class="line"><a name="l00617"></a><span class="lineno">  617</span>&#160;}</div>
<div class="line"><a name="l00618"></a><span class="lineno">  618</span>&#160;</div>
<div class="line"><a name="l00619"></a><span class="lineno">  619</span>&#160;<span class="comment">// assumes there is a copy constructor ready. Always try from most</span></div>
<div class="line"><a name="l00620"></a><span class="lineno">  620</span>&#160;<span class="comment">// specific to most general</span></div>
<div class="line"><a name="l00621"></a><span class="lineno">  621</span>&#160;<span class="preprocessor">#define TRYCLONE(classname, obj) \</span></div>
<div class="line"><a name="l00622"></a><span class="lineno">  622</span>&#160;<span class="preprocessor">    if (const classname *clo = dynamic_cast&lt;const classname *&gt;(obj)) { \</span></div>
<div class="line"><a name="l00623"></a><span class="lineno">  623</span>&#160;<span class="preprocessor">        return new classname(*clo); \</span></div>
<div class="line"><a name="l00624"></a><span class="lineno">  624</span>&#160;<span class="preprocessor">    } else</span></div>
<div class="line"><a name="l00625"></a><span class="lineno">  625</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00626"></a><span class="lineno">  626</span>&#160;VectorTransform *Cloner::clone_VectorTransform (<span class="keyword">const</span> VectorTransform *vt)</div>
<div class="line"><a name="l00627"></a><span class="lineno">  627</span>&#160;{</div>
<div class="line"><a name="l00628"></a><span class="lineno">  628</span>&#160;    TRYCLONE (RemapDimensionsTransform, vt)</div>
<div class="line"><a name="l00629"></a><span class="lineno">  629</span>&#160;    TRYCLONE (OPQMatrix, vt)</div>
<div class="line"><a name="l00630"></a><span class="lineno">  630</span>&#160;    TRYCLONE (PCAMatrix, vt)</div>
<div class="line"><a name="l00631"></a><span class="lineno">  631</span>&#160;    TRYCLONE (RandomRotationMatrix, vt)</div>
<div class="line"><a name="l00632"></a><span class="lineno">  632</span>&#160;    TRYCLONE (LinearTransform, vt)</div>
<div class="line"><a name="l00633"></a><span class="lineno">  633</span>&#160;    {</div>
<div class="line"><a name="l00634"></a><span class="lineno">  634</span>&#160;        FAISS_ASSERT(!<span class="stringliteral">&quot;clone not supported for this type of VectorTransform&quot;</span>);</div>
<div class="line"><a name="l00635"></a><span class="lineno">  635</span>&#160;    }</div>
<div class="line"><a name="l00636"></a><span class="lineno">  636</span>&#160;    <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00637"></a><span class="lineno">  637</span>&#160;}</div>
<div class="line"><a name="l00638"></a><span class="lineno">  638</span>&#160;</div>
<div class="line"><a name="l00639"></a><span class="lineno">  639</span>&#160;IndexIVF * Cloner::clone_IndexIVF (<span class="keyword">const</span> IndexIVF *ivf)</div>
<div class="line"><a name="l00640"></a><span class="lineno">  640</span>&#160;{</div>
<div class="line"><a name="l00641"></a><span class="lineno">  641</span>&#160;    TRYCLONE (IndexIVFPQR, ivf)</div>
<div class="line"><a name="l00642"></a><span class="lineno">  642</span>&#160;    TRYCLONE (IndexIVFPQ, ivf)</div>
<div class="line"><a name="l00643"></a><span class="lineno">  643</span>&#160;    TRYCLONE (IndexIVFFlat, ivf)</div>
<div class="line"><a name="l00644"></a><span class="lineno">  644</span>&#160;    {</div>
<div class="line"><a name="l00645"></a><span class="lineno">  645</span>&#160;        FAISS_ASSERT(!<span class="stringliteral">&quot;clone not supported for this type of IndexIVF&quot;</span>);</div>
<div class="line"><a name="l00646"></a><span class="lineno">  646</span>&#160;    }</div>
<div class="line"><a name="l00647"></a><span class="lineno">  647</span>&#160;    <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00648"></a><span class="lineno">  648</span>&#160;}</div>
<div class="line"><a name="l00649"></a><span class="lineno">  649</span>&#160;</div>
<div class="line"><a name="l00650"></a><span class="lineno">  650</span>&#160;Index *Cloner::clone_Index (<span class="keyword">const</span> Index *index)</div>
<div class="line"><a name="l00651"></a><span class="lineno">  651</span>&#160;{</div>
<div class="line"><a name="l00652"></a><span class="lineno">  652</span>&#160;    TRYCLONE (IndexPQ, index)</div>
<div class="line"><a name="l00653"></a><span class="lineno">  653</span>&#160;    TRYCLONE (IndexLSH, index)</div>
<div class="line"><a name="l00654"></a><span class="lineno">  654</span>&#160;    TRYCLONE (IndexFlatL2, index)</div>
<div class="line"><a name="l00655"></a><span class="lineno">  655</span>&#160;    TRYCLONE (IndexFlatIP, index)</div>
<div class="line"><a name="l00656"></a><span class="lineno">  656</span>&#160;    TRYCLONE (IndexFlat, index)</div>
<div class="line"><a name="l00657"></a><span class="lineno">  657</span>&#160;    TRYCLONE (MultiIndexQuantizer, index)</div>
<div class="line"><a name="l00658"></a><span class="lineno">  658</span>&#160;    if (const IndexIVF * ivf = dynamic_cast&lt;const IndexIVF*&gt;(index)) {</div>
<div class="line"><a name="l00659"></a><span class="lineno">  659</span>&#160;        IndexIVF *res = clone_IndexIVF (ivf);</div>
<div class="line"><a name="l00660"></a><span class="lineno">  660</span>&#160;        res-&gt;own_fields = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00661"></a><span class="lineno">  661</span>&#160;        res-&gt;quantizer = clone_Index (ivf-&gt;quantizer);</div>
<div class="line"><a name="l00662"></a><span class="lineno">  662</span>&#160;        <span class="keywordflow">return</span> res;</div>
<div class="line"><a name="l00663"></a><span class="lineno">  663</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">const</span> IndexPreTransform * ipt =</div>
<div class="line"><a name="l00664"></a><span class="lineno">  664</span>&#160;               dynamic_cast&lt;const IndexPreTransform*&gt; (index)) {</div>
<div class="line"><a name="l00665"></a><span class="lineno">  665</span>&#160;        IndexPreTransform *res = <span class="keyword">new</span> IndexPreTransform ();</div>
<div class="line"><a name="l00666"></a><span class="lineno">  666</span>&#160;        res-&gt;d = ipt-&gt;d;</div>
<div class="line"><a name="l00667"></a><span class="lineno">  667</span>&#160;        res-&gt;index = clone_Index (ipt-&gt;index);</div>
<div class="line"><a name="l00668"></a><span class="lineno">  668</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; ipt-&gt;chain.size(); i++)</div>
<div class="line"><a name="l00669"></a><span class="lineno">  669</span>&#160;            res-&gt;chain.push_back (clone_VectorTransform (ipt-&gt;chain[i]));</div>
<div class="line"><a name="l00670"></a><span class="lineno">  670</span>&#160;        res-&gt;own_fields = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00671"></a><span class="lineno">  671</span>&#160;        <span class="keywordflow">return</span> res;</div>
<div class="line"><a name="l00672"></a><span class="lineno">  672</span>&#160;    } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00673"></a><span class="lineno">  673</span>&#160;        FAISS_ASSERT(!<span class="stringliteral">&quot;clone not supported for this type of Index&quot;</span>);</div>
<div class="line"><a name="l00674"></a><span class="lineno">  674</span>&#160;    }</div>
<div class="line"><a name="l00675"></a><span class="lineno">  675</span>&#160;    <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00676"></a><span class="lineno">  676</span>&#160;}</div>
<div class="line"><a name="l00677"></a><span class="lineno">  677</span>&#160;</div>
<div class="line"><a name="l00678"></a><span class="lineno">  678</span>&#160;</div>
<div class="line"><a name="l00679"></a><span class="lineno">  679</span>&#160;} <span class="comment">// namespace faiss</span></div>
<div class="ttc" id="structfaiss_1_1IndexPQ_html_a490b64b12384951ed66548a3a48f91e5"><div class="ttname"><a href="structfaiss_1_1IndexPQ.html#a490b64b12384951ed66548a3a48f91e5">faiss::IndexPQ::codes</a></div><div class="ttdeci">std::vector&lt; uint8_t &gt; codes</div><div class="ttdoc">Codes. Size ntotal * pq.code_size. </div><div class="ttdef"><b>Definition:</b> <a href="IndexPQ_8h_source.html#l00035">IndexPQ.h:35</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexFlat_html"><div class="ttname"><a href="structfaiss_1_1IndexFlat.html">faiss::IndexFlat</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8h_source.html#l00024">IndexFlat.h:24</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexPreTransform_html_aee3cbbe7915ec9ed13d59ca9276bdefc"><div class="ttname"><a href="structfaiss_1_1IndexPreTransform.html#aee3cbbe7915ec9ed13d59ca9276bdefc">faiss::IndexPreTransform::index</a></div><div class="ttdeci">Index * index</div><div class="ttdoc">! chain of tranforms </div><div class="ttdef"><b>Definition:</b> <a href="VectorTransform_8h_source.html#l00241">VectorTransform.h:241</a></div></div>
<div class="ttc" id="structfaiss_1_1RandomRotationMatrix_html"><div class="ttname"><a href="structfaiss_1_1RandomRotationMatrix.html">faiss::RandomRotationMatrix</a></div><div class="ttdoc">Randomly rotate a set of vectors. </div><div class="ttdef"><b>Definition:</b> <a href="VectorTransform_8h_source.html#l00118">VectorTransform.h:118</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexPQ_html"><div class="ttname"><a href="structfaiss_1_1IndexPQ.html">faiss::IndexPQ</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexPQ_8h_source.html#l00029">IndexPQ.h:29</a></div></div>
<div class="ttc" id="namespacefaiss_html_aa46fe38a858ecfde7e0fc0744939d5ad"><div class="ttname"><a href="namespacefaiss.html#aa46fe38a858ecfde7e0fc0744939d5ad">faiss::read_index</a></div><div class="ttdeci">Index * read_index(FILE *f, bool try_mmap)</div><div class="ttdef"><b>Definition:</b> <a href="index__io_8cpp_source.html#l00476">index_io.cpp:476</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexLSH_html_a0116f529bc5de64a7ef142caa652d9f6"><div class="ttname"><a href="structfaiss_1_1IndexLSH.html#a0116f529bc5de64a7ef142caa652d9f6">faiss::IndexLSH::bytes_per_vec</a></div><div class="ttdeci">int bytes_per_vec</div><div class="ttdoc">nb of 8-bits per encoded vector </div><div class="ttdef"><b>Definition:</b> <a href="IndexLSH_8h_source.html#l00029">IndexLSH.h:29</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexLSH_html_ae203ad895b15ae16fc1a748661b84df3"><div class="ttname"><a href="structfaiss_1_1IndexLSH.html#ae203ad895b15ae16fc1a748661b84df3">faiss::IndexLSH::thresholds</a></div><div class="ttdeci">std::vector&lt; float &gt; thresholds</div><div class="ttdoc">thresholds to compare with </div><div class="ttdef"><b>Definition:</b> <a href="IndexLSH_8h_source.html#l00035">IndexLSH.h:35</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexFlatL2_html"><div class="ttname"><a href="structfaiss_1_1IndexFlatL2.html">faiss::IndexFlatL2</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8h_source.html#l00081">IndexFlat.h:81</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexLSH_html"><div class="ttname"><a href="structfaiss_1_1IndexLSH.html">faiss::IndexLSH</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexLSH_8h_source.html#l00025">IndexLSH.h:25</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexLSH_html_a5d4d6ea1fc709605d5b2061d1bce27d6"><div class="ttname"><a href="structfaiss_1_1IndexLSH.html#a5d4d6ea1fc709605d5b2061d1bce27d6">faiss::IndexLSH::train_thresholds</a></div><div class="ttdeci">bool train_thresholds</div><div class="ttdoc">whether we train thresholds or use 0 </div><div class="ttdef"><b>Definition:</b> <a href="IndexLSH_8h_source.html#l00031">IndexLSH.h:31</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexPreTransform_html"><div class="ttname"><a href="structfaiss_1_1IndexPreTransform.html">faiss::IndexPreTransform</a></div><div class="ttdef"><b>Definition:</b> <a href="VectorTransform_8h_source.html#l00238">VectorTransform.h:238</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFFlat_html"><div class="ttname"><a href="structfaiss_1_1IndexIVFFlat.html">faiss::IndexIVFFlat</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00113">IndexIVF.h:113</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexFlatIP_html"><div class="ttname"><a href="structfaiss_1_1IndexFlatIP.html">faiss::IndexFlatIP</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8h_source.html#l00075">IndexFlat.h:75</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexRefineFlat_html_a4acc0b3a8c33e5dd8851448ac162dfd0"><div class="ttname"><a href="structfaiss_1_1IndexRefineFlat.html#a4acc0b3a8c33e5dd8851448ac162dfd0">faiss::IndexRefineFlat::base_index</a></div><div class="ttdeci">Index * base_index</div><div class="ttdoc">faster index to pre-select the vectors that should be filtered </div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8h_source.html#l00111">IndexFlat.h:111</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexRefineFlat_html"><div class="ttname"><a href="structfaiss_1_1IndexRefineFlat.html">faiss::IndexRefineFlat</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8h_source.html#l00105">IndexFlat.h:105</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexRefineFlat_html_aab99f32713ece942ccefccf306292ca0"><div class="ttname"><a href="structfaiss_1_1IndexRefineFlat.html#aab99f32713ece942ccefccf306292ca0">faiss::IndexRefineFlat::refine_index</a></div><div class="ttdeci">IndexFlat refine_index</div><div class="ttdoc">storage for full vectors </div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8h_source.html#l00108">IndexFlat.h:108</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexRefineFlat_html_aaf0f6a094de0e9409effa81bedb9c7e2"><div class="ttname"><a href="structfaiss_1_1IndexRefineFlat.html#aaf0f6a094de0e9409effa81bedb9c7e2">faiss::IndexRefineFlat::own_fields</a></div><div class="ttdeci">bool own_fields</div><div class="ttdoc">should the base index be deallocated? </div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8h_source.html#l00112">IndexFlat.h:112</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a2a002388d2c081c2dbab8508dcefe73d"><div class="ttname"><a href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">faiss::Index::d</a></div><div class="ttdeci">int d</div><div class="ttdoc">vector dimension </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00066">Index.h:66</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexLSH_html_a71c8aa08d3bd0483ccc0f11c22cd3cd8"><div class="ttname"><a href="structfaiss_1_1IndexLSH.html#a71c8aa08d3bd0483ccc0f11c22cd3cd8">faiss::IndexLSH::rrot</a></div><div class="ttdeci">RandomRotationMatrix rrot</div><div class="ttdoc">optional random rotation </div><div class="ttdef"><b>Definition:</b> <a href="IndexLSH_8h_source.html#l00033">IndexLSH.h:33</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a040c6aed1f224f3ea7bf58eebc0c31a4"><div class="ttname"><a href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">faiss::Index::idx_t</a></div><div class="ttdeci">long idx_t</div><div class="ttdoc">all indices are this type </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00064">Index.h:64</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexPQ_html_aa7b7cfe0c8dfd37c8a940fd93d12dc88"><div class="ttname"><a href="structfaiss_1_1IndexPQ.html#aa7b7cfe0c8dfd37c8a940fd93d12dc88">faiss::IndexPQ::pq</a></div><div class="ttdeci">ProductQuantizer pq</div><div class="ttdoc">The product quantizer used to encode the vectors. </div><div class="ttdef"><b>Definition:</b> <a href="IndexPQ_8h_source.html#l00032">IndexPQ.h:32</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a6970683faa021b7a6f1a0865c0d4eccd"><div class="ttname"><a href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">faiss::Index::ntotal</a></div><div class="ttdeci">idx_t ntotal</div><div class="ttdoc">total nb of indexed vectors </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00067">Index.h:67</a></div></div>
<div class="ttc" id="structfaiss_1_1MultiIndexQuantizer_html"><div class="ttname"><a href="structfaiss_1_1MultiIndexQuantizer.html">faiss::MultiIndexQuantizer</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexPQ_8h_source.html#l00137">IndexPQ.h:137</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexPreTransform_html_ae5ec3f184eb211e7d6e204082b52c8c0"><div class="ttname"><a href="structfaiss_1_1IndexPreTransform.html#ae5ec3f184eb211e7d6e204082b52c8c0">faiss::IndexPreTransform::own_fields</a></div><div class="ttdeci">bool own_fields</div><div class="ttdoc">! the sub-index </div><div class="ttdef"><b>Definition:</b> <a href="VectorTransform_8h_source.html#l00243">VectorTransform.h:243</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a8e18f641854b2bde83ecff0a2f9a6f4e"><div class="ttname"><a href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">faiss::Index::metric_type</a></div><div class="ttdeci">MetricType metric_type</div><div class="ttdoc">type of metric this index uses for search </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00074">Index.h:74</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_ab38fde4c923abefc4185eb7450b5b95b"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">faiss::IndexIVF::nlist</a></div><div class="ttdeci">size_t nlist</div><div class="ttdoc">number of possible key values </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00047">IndexIVF.h:47</a></div></div>
<div class="ttc" id="structfaiss_1_1VectorTransform_html_a589d612f7b1773614619a0cbecd728a9"><div class="ttname"><a href="structfaiss_1_1VectorTransform.html#a589d612f7b1773614619a0cbecd728a9">faiss::VectorTransform::d_out</a></div><div class="ttdeci">int d_out</div><div class="ttdoc">! input dimension </div><div class="ttdef"><b>Definition:</b> <a href="VectorTransform_8h_source.html#l00034">VectorTransform.h:34</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexLSH_html_af8c48006f210f0cbbf45ec9972558d20"><div class="ttname"><a href="structfaiss_1_1IndexLSH.html#af8c48006f210f0cbbf45ec9972558d20">faiss::IndexLSH::nbits</a></div><div class="ttdeci">int nbits</div><div class="ttdoc">nb of bits per vector </div><div class="ttdef"><b>Definition:</b> <a href="IndexLSH_8h_source.html#l00028">IndexLSH.h:28</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html"><div class="ttname"><a href="structfaiss_1_1Index.html">faiss::Index</a></div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00061">Index.h:61</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexFlat_html_a9001de47890fe5d2eced9551d3613d47"><div class="ttname"><a href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">faiss::IndexFlat::xb</a></div><div class="ttdeci">std::vector&lt; float &gt; xb</div><div class="ttdoc">database vectors, size ntotal * d </div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8h_source.html#l00026">IndexFlat.h:26</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexPQ_html_aff455f2adff6064939494dad6e3017bc"><div class="ttname"><a href="structfaiss_1_1IndexPQ.html#aff455f2adff6064939494dad6e3017bc">faiss::IndexPQ::polysemous_ht</a></div><div class="ttdeci">int polysemous_ht</div><div class="ttdoc">Hamming threshold used for polysemy. </div><div class="ttdef"><b>Definition:</b> <a href="IndexPQ_8h_source.html#l00093">IndexPQ.h:93</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexRefineFlat_html_a7383fabb28db5b0df45ca4ea81f7acd4"><div class="ttname"><a href="structfaiss_1_1IndexRefineFlat.html#a7383fabb28db5b0df45ca4ea81f7acd4">faiss::IndexRefineFlat::k_factor</a></div><div class="ttdeci">float k_factor</div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8h_source.html#l00116">IndexFlat.h:116</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexLSH_html_a71e9142e1256705f125ded9d647f4497"><div class="ttname"><a href="structfaiss_1_1IndexLSH.html#a71e9142e1256705f125ded9d647f4497">faiss::IndexLSH::rotate_data</a></div><div class="ttdeci">bool rotate_data</div><div class="ttdoc">whether to apply a random rotation to input </div><div class="ttdef"><b>Definition:</b> <a href="IndexLSH_8h_source.html#l00030">IndexLSH.h:30</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexLSH_html_a55c0f1127850af0d06ef22fc8b791572"><div class="ttname"><a href="structfaiss_1_1IndexLSH.html#a55c0f1127850af0d06ef22fc8b791572">faiss::IndexLSH::codes</a></div><div class="ttdeci">std::vector&lt; uint8_t &gt; codes</div><div class="ttdoc">encoded dataset </div><div class="ttdef"><b>Definition:</b> <a href="IndexLSH_8h_source.html#l00038">IndexLSH.h:38</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFFlat_html_a52f87a2c6a9282b5b74a8615fef1b4b7"><div class="ttname"><a href="structfaiss_1_1IndexIVFFlat.html#a52f87a2c6a9282b5b74a8615fef1b4b7">faiss::IndexIVFFlat::vecs</a></div><div class="ttdeci">std::vector&lt; std::vector&lt; float &gt; &gt; vecs</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00116">IndexIVF.h:116</a></div></div>
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